Heel-trimming machine



(No Model.) 2 Sheets-Sheet 1,..

H. w. WINTER.

HEEL TRIMMING MACHINE'.

No. 448,310. Patented Mahl?, 1891.,

pli- IL (No Model.)

I :1 sheetssheet 2.. H. W.` WINTER.

HEL TRIMMING MACHINE.

No. 448,310. Patented Mar'. 1'7, 1891..

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Unir-nn STATES PATENT Frrcn HENRY IV. VIN'I'ER, OF BOSTON, ASSIGNOR TO J AMES lV. BROOKS, TRUSTEE,

4 OF CAMBRIDGE, MASSACHUSETTS.

HEEL-TRHVNIING MACHINE.

SPECIFICATION forming part of Letters Patent No. 448,310, dated March 17, 1891.

Application tiled April 23, 1889.

To all whom, it may concern:

Beit known that I, HENRY IV.' IVINTER, of Boston, county of Suitolk, State of Massachusetts, have invented an Improvement in Heel- 5 Trimming Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and Iigu res on the drawings representing like parts.

IO In the manufacture of boots or shoes the heels are trimmed after they are nailed on the sole. In machines for this purpose now in use the heel, if it varies in height or is longer from the heel-seat to the tread at the back of I5 the heel than from the heel-seat to the tread at the breast corners, cannot be trimmed satisfactorily by the machine-cutter alone, and

" such heels are commonly partially trimmed by hand. Attempts have been made to trim this class of heel by employing two rotary cutters of different shape, one to trim the tread end of the heel and the other to thereafter trim the heel-seat end ot the heel; but this is objectionable, as it requires two operations and is wasteful ot' time. Attempts have also been made to Vdo this class of work' by a cutter divided centrally and having its blades overlapped, one part of the cutter being made movable with relation to the other in the line of the axis of rotation of the cutter, but without tipping either part of the cutter; but the objection to such form ot cutter is that frequentlya part of the heel near its center is not trimmed smoothly and uniformly, but a bunch is left which has to be trimmed by hand. Yet other plans have been devised, as illustrated in applications, Serial Nos. 275,879 and 275,880, tiled June 25, 1888,

wherein a carriage having a rand -gnard to follow in the rand course is provided with a rand-cutter which overlaps the ends of the blades ot the cutter which shapes the heel, the said rand-cutter acting to prevent leaving a iin or feather-edge at the heel-seat, and also in the machine described in the said applications the rand-guard is .recessed and the ends of the blades of the rotarycntter are overlapped by the rand-guard, and the latter is so mounted or held as to be free to tip and uncover more or less ot the small end of the .rotary cutter farthest from the tread- Serial No. 308,282. (No model.)

guard; but by this plan heels varying very considerably in length, front and back, as stated, are not satisfactorily trimmed. Hence the object of this present invention is the production of a machine whereby a heel ot very considerable difference in length at the points stated may be trimmed accurately at one and the same operation. To accomplish this object I have devised a heel-trimming machine containing a rotary cutter in which the acting edges of the blades are in length equal to the length of the heel from the tread to the heel-seat at the breast corners, or the i length of the said blades correspond with the 6 5 heel at its point of least height, and co-operating with this cutter is an auxiliary cutter having its axis of rotation in a carriage or holder mounted or sustained at the end of the rotary heel-trimming cutter, the said carriage or holder being combined with a randguard of usual construction, the blades of the said auxiliary cutter being so shaped as to be capable of making a cut of such length as to rotate :in unison with and trim correctly all that part ot the heel which is not cut or trimmed by the blades of the heel-trimming cutter.

In accordance with my present invention the entire heelis trimmed at one and the same operation rather than at two operations.

My invention consists, essentially, in a heeltrimming machine containing the following instrumentalities, viz: a rotary heeltrimming cutter to trim the main body of the heel from its tread end toward the heehseat for substantially the height ot the heel at the breast corner, an auxiliary cutter to simultaneously trim to shape the heel at the rear thereof from the heel-scat toward the tread end of the heel to intersect that part of the heel from breast to breast, which is being trimmed by the rotary heeltrimming cutter, and a rand-guard supported to tip independently of the shaft carrying the rotary heelcutter.

Figure l in plan view and partial section represents part of alieel-trimming machine suiticient to enable my invention to be understood, the said figure. showing part of the shoe in two different positions. Fig. 2 is a partial IOC front elevation of the parts V shown in Fig. l,

the View being. taken in the direction ot' the arrow 2. Fig. 3 is an enlarged detail showing part of the main heel-trimming cutter land an auxiliary critter in two positions, the tread-guard being broken out. Fig. 4 is an inner end elevation of the hub and its attached auxiliary cutters; and Fig. 4 is a diagram showing in full lines the rear of the heel, the dotted lines showing the side of the heel to better illustrate the variation in height of the heel from its breast corner to the rear of the heel.

The frame-work A, a part only of which is represented, is and may be of any usual shape, the said frame-Work having suitable stands, as A', for the bearings A2, in which rotates the shaft A3, to which is connected the head of the rotating heeltrimming cutter, herein marked B, the said cutter having a series of blades b, the outlines ot' the cutting-edge of the said blades being represented by the dotted line b at the leftin Fig. l. (lo-operating with this heel-trimming cutter is a throat, as g, and a tread-guard g.

The head of the heel-trimming cutter and the blades may be of any usual shape.

The parts so far described are substantially the same as in United States application Serial No. 283,744.

The shaft A3 may beV rotated by any usual or suitable gearing common to heel-tri m min g machines.

The frame-work A has bolted or properly secured to it a suitable stand, as at C, herein represented as having a dovetailed groove for the reception ot a dovetailed shoe, as C', at one side of a block G2, the said block receiving in it a screw C3, (shown best in Fig. 1,) the threads of which engage threads cut in a lug C4, extended below the shoe, the end ot' the screw abutting against a lug C5 on the stand C, rotation of the screw adjusting the block C2 longitudinally in the direction of the length ot' the shaft A3. The head ot this screw is shown as broken off in' Fig. 2, the block C2 being also shown as broken out to represent the parts contained within it. The block C2 receives a cross-slide D, made longitudinally adjustable by a screw D. The crossslide D has an extension D2, which is represented, (see Fig. 1,) as provided with a seat having a concaved edge, against which acts the convex edge 2 of a cam-plate D3, adj ustably secured to the cross-slide by a bolt 3 in a slot 4, the said cam-plate having a groove, as 5, in which enters a stud 6, extended from an arm C, connected to or forming part ot' a tipping carriage E, having hubs 7 (see Fig. 2) at opposite points, the said hubs having connected to Vthem by suitable screws or studs 8 a link E', which at its opposite end is pivoted by like studs or screws 9 to hubs 10, carried by an adjustable plate E2, secured by bolt 12 to the cross-slide D. The carriage or The carriage or holder receives within it a hub c, provided at its inner end next the said heel trimming cutter B with a plate, as c', which is somewhat concaved at its tace, the said plate carrying, as herein shown, the auxiliary cutters c2. The hub c at its outer end beyond the carriage E has upon it ahead or n ut c3, which aids in preventing longitudinal movement ot the hub in the carriage or holder.

The head of the cutter B has universally jointed to it a link or connection 14, which is joined loosely with the hub c in such manner that the hub is rotated in unison with the shaft A3, but at the same time the carriage or holder is free to be tipped more or less, according to the position of the cam-plate, so that the axis of rotation of the hub carrying the auxiliary cutters may be placed more or less out of line with relation to the axis of rotation ot the shaft A3, carrying the heeltrimming cutter, the extent of tipping motion depending upon the position of the camplate D3, which may be adj usted at will.

In the machine under consideration the cutting-edges of the blades b are of a length only sufficient to trim the heel from the tread end toward the seat to a height not in excess of the height of the heel to the breast corners, and to trim the rear end of the heel, which from the tread end to the seat is longer, I have employed the auxiliary cutters.

These auxiliary cutters act upon and trim next the heel-seat all that part of the heel which is not acted upon and trimmed bythe blades b. The auxiliary cutters and the cutters Z) overlap each other, so that a tin cannot be left between .the two, and the cuttingedges of the auxiliary cutters are so made and located, or are of such contour, that a point of the cutting-edge of the auxiliary cutters always remains in line with a point or part of the cutting-edge ofthe blades b next to it, so that in any change of position of the auxiliary cutters with relation to the blades b by reason of the tipping of the carriage or holder E the surfaces left by the action of both the heel-trimming cutter and the auxiliary cutter come exactly together and leave a smooth junction, and thecontour of the sides of the heel from the heel-seat to the tread end thereof may be more or less concave or convex, according to the particular shape given to the edges of the blades Z) and of the cuttingedges of the auxiliary critters. For instance, the auxiliary cutters are shown as somewhat concave, so that the shape of the heel is generally that of a concave from the tread to the heel-seat; but were it desired to cut an Ogee heel then the auxiliary cutter would have a concave cutting-edge to give to the rear of the heel the desired shape.

An application, Serial No. 283,744,1iled by another and myself shows a heel-trimming cutter and a rand-cutter closely resembling the heel-trimming cutter and the auxiliary cutter herein shown, and the said applica- IIO IIS

tion also shows a rand-guard; but the said parts, although resemblingl the paris oi' the said application, cannot be used to aecomplish the purpose of this invention.

From the foregoing description it will be seen that the rand-guard as it travels iu the i rand-crease moves the carriage more or less longitudinally according to Variations in the height of the heel measured at its breast corner and at the back of the heel, and as the carriage and rand-guard are so moved longitudinally they are tipped in such manner through the cam-plate D3 and the co-operating roller or other stud of the carriage that the lip of the rand-guard follows substantially the contour of the blades of the main cutter and the cutting-edges of the auxiliary cutters in operation at or near the ends of the blades of the main cutter out the material from the heel-seat toward the tread end of the heel and leave a surface which coincides as a line with the surface of the heel left by the operation ot the blades of the heel-trimming cutter which cuts the heel from its tread end nearly to the heel-seat end at the back of the heel.

I do not desire to limit my invention to the employment of a main auxiliary cutter of the precise form shown, as instead I may employ cutters ot any usual or well-known form by which it is capable to trim a heel in the manner'described, and it will be understood that the contour to be given to the heel from its tread to its seat end may be varied at will by simply shaping the cutting-edges of the main and auxiliary cutters to cut in the lines required. t

In Fig. 3 I have shown one of the blades b of the main heel-trimming cutter B and one of the auxiliar)` cutters c2 with its lip 20, the latter entering the rand crease. The full lines show the heel h in position to have its side trimmed, whilethe dotted lines 7L show the heel and shoe turned to bring the rear of the heel in position to be trimmed. The dotted line 2l just to the left of the full line 22 shows the width of the blade. rI`he distance between the points 23 and 24 represents the height of the heel at the breast. The distancebetween the points 25 and 26 represents the height of the heel at its rear end.

The dotted line between the points 23 and 26 represents the tread end of the heel when the rear end of the heel is being trimmed. The dotted line between the points 24 and 25 represents the seat ot' the heel next the upper s. The dotted line between the points 24 and 27 along the lines between 25, 2G, 23, and 2% represents that part of the body of the heel which trimmed by the blades b of the main cutter from the tread of the heel toward the seat, and the triangular space bounded by the dotted lines 25 24 27 designates the space which is trimmed by the auxiliary cutter c2, which is drawn out and in between the bladesV Z2 ot the cutter B by the lip ot the rand-guard (shown in Figs. l. and 2) running in thc rand-creasel). In this operation the carriage referred to as it is moved by the rand-guard in the rand-crease is tipped, as described, and in doing so the cuttingedge of thel auxiliary cutter follows and cuts in a line which is a continuation of the line ot curvature to be given to the heel, and the surface cut at the rear of the heel by the two simultaneously-acting cutters is continuous or merge one into the other without any hump or ridge between.

I claim- I. In a heel-trimming machine, the following instrumentalities, viz: a rotary heel-trimming cutter to trim the body of the heel from its tread end toward the heel-seat for substatitially the height of the heel toward the breastcorner, a rand-gi'iard, a tipping carriage supported to tip independently ot the shaft. carrying' the said heel-trimming cutter and to which carriage the said rand-guard is connected, and an auxiliary cutter mounted to rotate in the said tipping carriage and having an edge to simultaneously act upon and trim that part of the heel at the rear thereof from the heel-seat toward the tread end of the heel which is not trimmed by the said rotary heel-tri m ming cutter, the surfaces at the rear of the heel cut by these two cutters coinciding as a line, substantially as described.

2. In a heel-trimming machine, a main rotary cutter having a series of blades to act upon and trim the heel from its treadvend toward its seat endfor a distance not greater' than the height of the heel measured at the breast corner, combined with an independent auxiliary cutter mounted on a separate tipping shaft located at the end of the main cutter and having its cutting-edges located in the space between the said blades, the cutting-edges of the said auxiliary cutter being adapted to trim only that part of the heel at and along its seat and about the rear which is of greater height than the main body of the heel at the breast corner, and which part is not cut by the main rotary heel-trimming cutter, the surface left by the joint action of the main and auxiliary cutters coinciding as a line, thereby obviating any irregularity of curvature in the iinshed heel, as and for the purpose set forth.

In a heel-trimming machine, a main rotary cutter having a series of blades to act upon and trim the heel from its tread end toward its seat end for a distance not greater than the height ot' the heel measured at the breast corner, combined with an independent auxiliary cutter mounted on a separate tipping shatt located at the end of the main cutter and having its cutting-edges located in the space between the said blades, the cutting-edges ot the said auxiliary cutter being adapted to trim only that part of the heel at and along its seat and about the rear which is of greater height than the main body of IIO the heel at the breast corner, and whiohpart I In testimony whereof I have signed my is not out by the main rotary heel-trimming naine to this specication in the presence ot cutter, the surface left by tho joint action of two subscribing' Witnesses. the main and auxiliary cutters coinciding as HENRY XV. VINTER.

5 a line, thereby obviating any irregularity of curvature in the inished heel, and with a rand-cutter, as and for the purpose set forth. 1

Witnesses:

I-I. P. FAIRFIELD, GEO. W. HAMMATT. 

